Sensor

Abstract

A sensor for devices such as mining machines, shaft-lining supports or extracting plants in underground mining, comprising a sensor device ( 15 ) disposed in a casing ( 11 ) and scanning measurements or variables and converting them into electric signals, also comprising a connecting element ( 26 ) in the form of a plug or socket fixed to the sensor casing ( 11 ) and adapted to be coupled to a receiving connection on the device and through which the sensor device ( 15 ) is supplied with the measurement or variable, and also comprising a flexible sheathed cable ( 1 ) comprising conductors ( 4 ) and a sheath ( 2 ), the sensor device ( 15 ) being electrically connectable via the conductors ( 4 ) to an evaluating device, in which the sensor casing ( 11 ) comprises a portion ( 13 ) with a cable insertion opening ( 20 ) to which the sheathed cable ( 1 ) is fastened in tension-resistant manner, wherein the conductors ( 4 ) are firmly connected through the cable insertion opening to the sensor device ( 15 ).

1 . A sensor for devices such as mining machines, shaft-lining supports or extracting plants in underground mining, comprising a sensor device disposed in a casing and scanning measurements or variables and converting them into electric signals, also comprising a connecting element in the form of a plug or socket fixed to the sensor casing and adapted to be coupled to a receiving connection on the device and through which the sensor device is supplied with the measurement or variable, and also comprising a flexible sheathed cable comprising conductors and a sheath, the sensor device being electrically connectable via the conductors to an evaluating device, in which the sensor casing comprises a portion with a cable insertion opening to which the sheathed cable is fastened in tension-resistant manner, wherein the conductors are firmly connected through the cable insertion opening to the sensor device.  
   
   
       2 . A sensor according to  claim 1 , in which the sensor device is multi-part and comprises a measuring body spaced apart from an electronic measuring unit, and connected thereto by electric connecting conductors, wherein the cores are firmly connected to the electronic unit.  
   
   
       3 . A sensor according to  claim 1 , in which the sensor device is a sensor cell.  
   
   
       4 . A sensor according to  claim 1 , in which the casing portion comprising the cable insertion opening is a crimpable insertion sleeve and engages over the sheathed cable on the sensor side.  
   
   
       5 . A sensor according to  claim 4 , in which the sensor casing and the integrally moulded insertion sleeve are formed of brass.  
   
   
       6 . A sensor according to  claim 1 , in which the sheathed cable is connected in tension-resistant manner to the sensor casing by a crimp barrel.  
   
   
       7 . A sensor according to  claim 6 , in which the sensor casing, on or in the region of the cable insertion opening, has a collar with a web which engages behind the crimp barrel.  
   
   
       8 . A sensor according to  claim 6 , in which the sensor casing and the crimp barrel are formed of brass.  
   
   
       9 . A sensor according to  claim 1 , in which the connecting element is fixed to the sensor casing by a screwable fixing ring.  
   
   
       10 . A sensor according to  claim 1 , in which the sheathed cable has an electric connecting plug at its free end.  
   
   
       11 . A sensor according to  claim 10 , in which a multi-core cable comprising the conductors and with insulation is provided in the sheath of the cable and projects at the free end of the sheath from a socket sealed by an O-ring and receiving the sheath in tension-resistant manner whereas at its cable end it has an electric connecting plug.  
   
   
       12 . A sensor according to  claim 1 , in which a cable connector is fastened to the other end of the sheathed cable and comprises a one-part hollow coupling sleeve which extends over an armoured protective sheath and receives the end of the sheathed cable in tension-resistant manner in a compression joint, especially by crimping, and is connected via a catch connection to a plug insert which receives contact elements electrically connected to the conductors and preferably comprising pins and sockets, wherein a cable feed-through opening in the hollow coupling sleeve is partly filled with sealing compound and the coupling sleeve has an extension which is deformable in order to form the compression joint and exclusively holds only the protective cable and sheath and armouring and the conductors disposed in the cable.